Universal long-gun sling



FIG. 1 is a perspective view of a universal long-gun sling showing my new design;

FIG. 2 is a top plan view, the bottom plan view being a mirror image; and,

FIG. 3 is a side elevational view, the opposite side being essentially a mirror image. 

The ornamental design for a universal long-gun sling, as shown and descri. d 